Find the solution(s) for x in the equation below. x(x - 1) = 42
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ОА.
I = -7; 1 = -6
OB. I = 7; 1 = 6
OC. I = 7; 1 = -6
OD
1 = 6
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Last month, a 770 g box of cereal was sold at a grocery store for $3.10. however, this month, the cereal manufacturer launched the same cereal in a 640 g box, which is being sold at $2.50. what is the percent change in the unit price?